Use latloncover package name

app.py

@@ -1,6 +1,6 @@
 import streamlit as st
 import pandas as pd
-from cover.classify import add_classifications
+from latloncover.classify import add_classifications
 
 st.title("LatLonCover Demo")
 st.subheader('Add land coverage data to a CSV :sunglasses:')
@@ -23,7 +23,7 @@ if st.button('Process CSV') and uploaded_file is not None:
    df = pd.read_csv(uploaded_file)
 
    with st.spinner('Fetching land coverage data...'):
-       add_classifications(df, lat_col=lat_col, lon_col=lon_col)
+       df = add_classifications(df, lat_col=lat_col, lon_col=lon_col)
    st.download_button('Download CSV', df.to_csv(index=False), file_name="LatLonCover.csv")